Datasheet

Products I ISC O-Rings and Static Seals

Spiral Back-Up Ring SPR

Product description

Spiral-shaped split bearing component with rectangular

cross section.

Product advantages

Advantage compared to conventional back-up rings:

Even in cases where considerable temperature fluctua-

tions occur, i.e. if there is post-shrinkage of the back- up

ring, at least one turn of the spiral will be left to support

the ISC O-Ring over the gap at any point around the

circumference.

Also suitable for non-standard diameters, as the ring

can be shortened and thus adapted to fit.

Application

Bearing component to prevent gap extrusion of radial

sealing ISC O-Rings.

Material

Material Code

Unfilled PTFE

PTFE00/F52800

or PTFE 177509

Operating conditions

Media Temperature

All fluids used in hydraulics

–70 … +260 °C*

(only valid for PTFE component)

* according to the O-ring material used

Fitting & installation

The surface finish requirements correspond to the values

stipulated. Gap width: when using PTFE spiral back-up

rings, operating pressures ≤40 MPa (400 bar) or gap

widths up to 0,3 mm can be bridged. Special sizes or

special materials are available on enquiry.